Lemonpeel ?

[wolffam]

My lemonpeel recently has cleared a spot inside a hole in the rocks. At night it swims into the hole and lays on its side. If I walk by, it'll swim out as though protecting the hole. Any clues as to what might be happening? This just started about a week ago. Only additions to the tank have been corals.

 

[ivanfj]

My fish did just the same so I guess they like to do that. It's like making a bed for themselves at night.